RU22084U1 - BORING AND CUTTING HEAD - Google Patents

Abstract

A boring-cutting head containing a housing, a rod with rack gears, to one of which a balance is attached, to the other a holder with a cutter, characterized in that the holder is made of a crawler and a replaceable tool holder, and the housing is equipped with a rigid adjustable stop in the form of a screw and opposite spring-loaded stop in contact with the creep, while in the tool holder and creep are made opposite threaded holes with offset axes for screws.

Description

2001122406

-AND

2 About CH 1 1

MKY at 23 D 41/04

RISTER - CUTTING HEAD

The utility model relates to the field of metal machining by cutting and can be used in mechanical engineering, in particular, for boring holes and cutting ends of a product

Known tool adjustment for boring and trimming of the ends (see A.S. N 1253742 MKI V23B 29/034), containing holders mounted on the body of the faceplate with boring and cutting tools, gears.

This technical solution is complex in design, a large number of transitional links from the headstock to the machined surfaces reduces the accuracy of the product. In addition, it is impossible to bore a dull product with sequential cutting of the end face.

Known cutter head C. K 1342609, JKJ V23B 29/034), comprising a housing in the central opening of which a drive is connected associated with a round rail that engages with flat rails mounted on tool holders interacting via a lever system

However, the presence of a lever system with an additional tool holder in combination with a round rail fixed with flat rails reduces the rigidity of the entire system, and the accuracy of processing the product decreases.

The technical result achieved by the utility model consists in increasing the accuracy of the workpiece and expanding the technological capabilities of using a boring - cutting head for processing a wide range of blind holes

a pus rod with rack gears to one of which a balancer is attached to another a holder with a cutter consisting of a crawler and a replaceable tool holder, while the casing is equipped with a rigid adjustable stop in the form of a screw and an opposed spring-loaded stop in contact with the cradle, and opposed threaded holes are made in the tool holder and cradle holes for screws in which the axis of the threaded holes of the tool holder is offset relative to the axis of the holes of the crawler towards the body The essence of the utility model is illustrated Jamie Figure 1 shows a general view Boring - scoring head assembly

In Fig. 2, a section fl - A in Fig. 3 is a diagram of the stroke of the rod and the sprocket. The boring - cutting head is made as follows. In the body 1, the rod 2 of the pneumatic cylinder is placed. On one side of the rod, rack mesh with the balancer 3 is made on the other side and the rack mesh with the holder 4 by means of rails 5 The holder consists of a cradle 6 in the hole 7 of which a tool holder 8 with a cutter 9 is installed. The tool holder is made with a cylindrical shank 10 with two opposed conical holes 11 connected by a common cylindrical hole 12 V crawled two opposite threaded holes 13 for screws 14 with a conical part 15 are made to the eye. The axis 16 of the tool holder threaded holes is shifted relative to the axis 1 of the crawler holes towards the housing. An adjustable stop screw 18 and a spring-loaded stop opposite to it

Boring - cutting head works as follows:

adjustable stop screw 18 rail 5.

2, cutting the ends. The hydraulic system of the machine converts the translational movement of the rod 2 into the radial movement of the slider 6 through rack gearing. Cutting of the end face of the product is carried out with the reverse stroke of the rod 2, which ensures the smooth operation of the cutter 9. The spring stop 19 fixes the creep 6 with the tool holder 8 in the extreme position (the position of the bore hole) on the adjustable stop screw 18, which allows to save the gap between the rod 2 and rails 5 to save smooth running of the slider 6 at the moment of the beginning of the stroke of the rod 2 when cutting the end.

When screws 14 are screwed into the spindle 6, the conical part of the screws moving along the conical part of the holes And, due to the displacement of the axes 16 and 1, firmly presses the end face of the tool holder 8 to the end face of the sprocket 6. The holder (4) is stressed (elastic).

End trimming is carried out by the stroke of the rod back.

The value of the crawler stroke / 7 is determined by the formula:

L - ./1

 r t where:

/ and - the largest diameter of the cutting mm; C / is the smallest cutting diameter, mm; 4 - the amount of overrun of the cutter, mm Stroke / 7 is determined by the boring depth /, mm.

Using the proposed technical solution allows you to:

1. with one cutter to form two surfaces in series, which ensures obtaining the specified tolerances and the shape of the hole;

without a gap in the crawl and provide tension in the holder of the cutter-holder system;

3. the implementation of the holder of the individual parts (crawler and tool holder) allows you to use dandy head for processing holes of other diameters and also for convenience during repair;

4 rails are made separately from the crawler and the balancer, which is convenient when repairing or replacing them (

Claims (1)

A boring-cutting head containing a housing, a rod with rack gears, to one of which a balance is attached, to the other a holder with a cutter, characterized in that the holder is made of a crawler and a replaceable tool holder, and the housing is equipped with a rigid adjustable stop in the form of a screw and opposite spring-loaded stop in contact with the creep, while in the tool holder and creep are made opposite threaded holes with offset axes for screws.